Apparatus for remote position indication in a hydraulic position

Details Apparatus for remote position indication in a hydraulic position Apparatus for remote position indication in a hydraulic position

1977-03-02

1979-05-01

Schwadron, Martin P.

Motors: expansible chamber type

Fluid supply through diverse paths to single expansible chamber

Activation of one path disables second path

60546, 91171, 91189R, 91520, F15B 1304

Patent

active

041517857

ABSTRACT:
A hydraulic positioning drive with a physically separated work cylinder which is connected via pressure oil lines, comprises a follow-up cylinder mounted at the positioning drive or in the immediate vicinity thereof, of the same type and the same volume as the work cylinder, which is hydraulically connected in series with the latter, so that its piston moves synchronously with that of the work cylinder. The piston position of the follow-up cylinder is sensed electrically and used as the positioner position. For synchronizing, both cylinders are connected in parallel from time to time and their pistons are run into the end positions.

REFERENCES:
patent: 3106084 (1963-10-01), Hoffman
patent: 3543645 (1970-12-01), Baatrup
patent: 3648565 (1972-03-01), Probst
patent: 3712180 (1973-01-01), Pieper
patent: 3855794 (1974-12-01), Meyer
patent: 4006664 (1977-02-01), Brown
patent: 4037519 (1977-07-01), Miller

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